Fix part of oppia#5404: Migrate away from onBackPressed (oppia#5521)

<!-- READ ME FIRST: Please fill in the explanation section below and
check off every point from the Essential Checklist! -->

## Explanation
<!-- 
- Explain what your PR does. If this PR fixes an existing bug, please
include
- "Fixes #bugnum:" in the explanation so that GitHub can auto-close the
issue
  - when this PR is merged.
  -->
Fixes part of oppia#5404 

This PR migrates deprecated `onBackPressed` usage to
`OnBackPressedDispatcher` callback in the following activities and
presenters.

- AdministratorControlsActivity
- AppVersionActivity
- ProfileAndDeviceIdActivity
- MarkChaptersCompletedActivity
- MarkStoriesCompletedActivity
- MarkTopicsCompletedActivity
- ReadingTextSizeActivityPresenter
- ExplorationActivityPresenter
- ResumeLessonActivityPresenter


## Essential Checklist
<!-- Please tick the relevant boxes by putting an "x" in them. -->
- [x] The PR title and explanation each start with "Fix #bugnum: " (If
this PR fixes part of an issue, prefix the title with "Fix part of
#bugnum: ...".)
- [x] Any changes to
[scripts/assets](https://github.com/oppia/oppia-android/tree/develop/scripts/assets)
files have their rationale included in the PR explanation.
- [x] The PR follows the [style
guide](https://github.com/oppia/oppia-android/wiki/Coding-style-guide).
- [x] The PR does not contain any unnecessary code changes from Android
Studio
([reference](https://github.com/oppia/oppia-android/wiki/Guidance-on-submitting-a-PR#undo-unnecessary-changes)).
- [x] The PR is made from a branch that's **not** called "develop" and
is up-to-date with "develop".
- [x] The PR is **assigned** to the appropriate reviewers
([reference](https://github.com/oppia/oppia-android/wiki/Guidance-on-submitting-a-PR#clarification-regarding-assignees-and-reviewers-section)).

## For UI-specific PRs only
<!-- Delete these section if this PR does not include UI-related
changes. -->
If your PR includes UI-related changes, then:
- Add screenshots for portrait/landscape for both a tablet & phone of
the before & after UI changes
- For the screenshots above, include both English and pseudo-localized
(RTL) screenshots (see [RTL
guide](https://github.com/oppia/oppia-android/wiki/RTL-Guidelines))
- Add a video showing the full UX flow with a screen reader enabled (see
[accessibility
guide](https://github.com/oppia/oppia-android/wiki/Accessibility-A11y-Guide))
- For PRs introducing new UI elements or color changes, both light and
dark mode screenshots must be included
- Add a screenshot demonstrating that you ran affected Espresso tests
locally & that they're passing

---------

Co-authored-by: Adhiambo Peres <59600948+adhiamboperes@users.noreply.github.com>

app/src/main/java/org/oppia/android/app/administratorcontrols/AdministratorControlsActivity.kt

@@ -3,6 +3,7 @@ package org.oppia.android.app.administratorcontrols
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.R
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
@@ -83,6 +84,15 @@ class AdministratorControlsActivity :
       isProfileDeletionDialogVisible
     )
     title = resourceHandler.getStringInLocale(R.string.administrator_controls)
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          this@AdministratorControlsActivity.handleBackPress()
+        }
+      }
+    )
   }
 
   override fun routeToAppVersion() {
@@ -121,7 +131,7 @@ class AdministratorControlsActivity :
     }
   }
 
-  override fun onBackPressed() {
+  private fun handleBackPress() {
     val fragment =
       supportFragmentManager.findFragmentById(
         R.id.administrator_controls_fragment_multipane_placeholder
@@ -134,8 +144,7 @@ class AdministratorControlsActivity :
     if (fragment is ProfileEditFragment) {
       administratorControlsActivityPresenter.handleOnBackPressed()
     } else {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      super.onBackPressed()
+      finish()
     }
   }
 

app/src/main/java/org/oppia/android/app/administratorcontrols/appversion/AppVersionActivity.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.model.ScreenName.APP_VERSION_ACTIVITY
@@ -19,12 +20,20 @@ class AppVersionActivity : InjectableAutoLocalizedAppCompatActivity() {
     super.onCreate(savedInstanceState)
     (activityComponent as ActivityComponentImpl).inject(this)
     appVersionActivityPresenter.handleOnCreate()
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          finish()
+        }
+      }
+    )
   }
 
   override fun onOptionsItemSelected(item: MenuItem): Boolean {
     if (item.itemId == android.R.id.home) {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      onBackPressed()
+      onBackPressedDispatcher.onBackPressed()
     }
     return super.onOptionsItemSelected(item)
   }

app/src/main/java/org/oppia/android/app/administratorcontrols/learneranalytics/ProfileAndDeviceIdActivity.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.model.ScreenName.PROFILE_AND_DEVICE_ID_ACTIVITY
@@ -18,18 +19,27 @@ import javax.inject.Inject
  * a particular user or group.
  */
 class ProfileAndDeviceIdActivity : InjectableAutoLocalizedAppCompatActivity() {
-  @Inject lateinit var profileAndDeviceIdActivityPresenter: ProfileAndDeviceIdActivityPresenter
+  @Inject
+  lateinit var profileAndDeviceIdActivityPresenter: ProfileAndDeviceIdActivityPresenter
 
   override fun onCreate(savedInstanceState: Bundle?) {
     super.onCreate(savedInstanceState)
     (activityComponent as ActivityComponentImpl).inject(this)
     profileAndDeviceIdActivityPresenter.handleOnCreate()
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          finish()
+        }
+      }
+    )
   }
 
   override fun onOptionsItemSelected(item: MenuItem): Boolean {
     if (item.itemId == android.R.id.home) {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      onBackPressed()
+      onBackPressedDispatcher.onBackPressed()
     }
     return super.onOptionsItemSelected(item)
   }

app/src/main/java/org/oppia/android/app/devoptions/markchapterscompleted/MarkChaptersCompletedActivity.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.R
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
@@ -37,12 +38,20 @@ class MarkChaptersCompletedActivity : InjectableAutoLocalizedAppCompatActivity()
     val showConfirmationNotice = args?.showConfirmationNotice ?: false
     markChaptersCompletedActivityPresenter.handleOnCreate(internalProfileId, showConfirmationNotice)
     title = resourceHandler.getStringInLocale(R.string.mark_chapters_completed_activity_title)
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          finish()
+        }
+      }
+    )
   }
 
   override fun onOptionsItemSelected(item: MenuItem): Boolean {
     if (item.itemId == android.R.id.home) {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      onBackPressed()
+      onBackPressedDispatcher.onBackPressed()
     }
     return super.onOptionsItemSelected(item)
   }

app/src/main/java/org/oppia/android/app/devoptions/markstoriescompleted/MarkStoriesCompletedActivity.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.R
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
@@ -34,12 +35,20 @@ class MarkStoriesCompletedActivity : InjectableAutoLocalizedAppCompatActivity()
     internalProfileId = profileId?.internalId ?: -1
     markStoriesCompletedActivityPresenter.handleOnCreate(internalProfileId)
     title = resourceHandler.getStringInLocale(R.string.mark_stories_completed_activity_title)
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          finish()
+        }
+      }
+    )
   }
 
   override fun onOptionsItemSelected(item: MenuItem): Boolean {
     if (item.itemId == android.R.id.home) {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      onBackPressed()
+      onBackPressedDispatcher.onBackPressed()
     }
     return super.onOptionsItemSelected(item)
   }

app/src/main/java/org/oppia/android/app/devoptions/marktopicscompleted/MarkTopicsCompletedActivity.kt

@@ -4,6 +4,7 @@ import android.content.Context
 import android.content.Intent
 import android.os.Bundle
 import android.view.MenuItem
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.R
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
@@ -34,12 +35,20 @@ class MarkTopicsCompletedActivity : InjectableAutoLocalizedAppCompatActivity() {
     internalProfileId = profileId?.internalId ?: -1
     markTopicsCompletedActivityPresenter.handleOnCreate(internalProfileId)
     title = resourceHandler.getStringInLocale(R.string.mark_topics_completed_activity_title)
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          finish()
+        }
+      }
+    )
   }
 
   override fun onOptionsItemSelected(item: MenuItem): Boolean {
     if (item.itemId == android.R.id.home) {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      onBackPressed()
+      onBackPressedDispatcher.onBackPressed()
     }
     return super.onOptionsItemSelected(item)
   }

app/src/main/java/org/oppia/android/app/options/ReadingTextSizeActivity.kt

@@ -3,6 +3,7 @@ package org.oppia.android.app.options
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.model.ReadingTextSize
@@ -34,6 +35,22 @@ class ReadingTextSizeActivity : InjectableAutoLocalizedAppCompatActivity() {
       savedInstanceState?.retrieveStateBundle()?.selectedReadingTextSize
         ?: retrieveActivityParams().readingTextSize
     readingTextSizeActivityPresenter.handleOnCreate(readingTextSize)
+
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          val resultBundle = ReadingTextSizeActivityResultBundle.newBuilder().apply {
+            selectedReadingTextSize = readingTextSizeActivityPresenter.getSelectedReadingTextSize()
+          }.build()
+          val intent = Intent().apply {
+            putProtoExtra(MESSAGE_READING_TEXT_SIZE_RESULTS_KEY, resultBundle)
+          }
+          setResult(RESULT_OK, intent)
+          finish()
+        }
+      }
+    )
   }
 
   companion object {
@@ -60,17 +77,6 @@ class ReadingTextSizeActivity : InjectableAutoLocalizedAppCompatActivity() {
     outState.putProto(ACTIVITY_SAVED_STATE_KEY, stateBundle)
   }
 
-  override fun onBackPressed() {
-    val resultBundle = ReadingTextSizeActivityResultBundle.newBuilder().apply {
-      selectedReadingTextSize = readingTextSizeActivityPresenter.getSelectedReadingTextSize()
-    }.build()
-    val intent = Intent().apply {
-      putProtoExtra(MESSAGE_READING_TEXT_SIZE_RESULTS_KEY, resultBundle)
-    }
-    setResult(RESULT_OK, intent)
-    finish()
-  }
-
   private fun retrieveActivityParams() =
     intent.getProtoExtra(ACTIVITY_PARAMS_KEY, ReadingTextSizeActivityParams.getDefaultInstance())
 

app/src/main/java/org/oppia/android/app/options/ReadingTextSizeActivityPresenter.kt

@@ -28,8 +28,7 @@ class ReadingTextSizeActivityPresenter @Inject constructor(
   private fun setToolbar() {
     val readingTextSizeToolbar: Toolbar = activity.findViewById(R.id.reading_text_size_toolbar)
     readingTextSizeToolbar.setNavigationOnClickListener {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      activity.onBackPressed()
+      activity.onBackPressedDispatcher.onBackPressed()
     }
   }
 

app/src/main/java/org/oppia/android/app/player/exploration/ExplorationActivity.kt

@@ -3,6 +3,7 @@ package org.oppia.android.app.player.exploration
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.hintsandsolution.HintsAndSolutionDialogFragment
@@ -48,7 +49,8 @@ class ExplorationActivity :
   BottomSheetOptionsMenuItemClickListener,
   RequestVoiceOverIconSpotlightListener {
 
-  @Inject lateinit var explorationActivityPresenter: ExplorationActivityPresenter
+  @Inject
+  lateinit var explorationActivityPresenter: ExplorationActivityPresenter
   private lateinit var state: State
   private lateinit var writtenTranslationContext: WrittenTranslationContext
 
@@ -67,6 +69,14 @@ class ExplorationActivity :
       params.parentScreen,
       params.isCheckpointingEnabled
     )
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          explorationActivityPresenter.backButtonPressed()
+        }
+      }
+    )
   }
 
   // TODO(#1655): Re-restrict access to fields in tests post-Gradle.
@@ -114,10 +124,6 @@ class ExplorationActivity :
       getProtoExtra(PARAMS_KEY, ExplorationActivityParams.getDefaultInstance())
   }
 
-  override fun onBackPressed() {
-    explorationActivityPresenter.backButtonPressed()
-  }
-
   override fun deleteCurrentProgressAndStopSession(isCompletion: Boolean) {
     explorationActivityPresenter.deleteCurrentProgressAndStopExploration(isCompletion)
   }

app/src/main/java/org/oppia/android/app/player/exploration/ExplorationActivityPresenter.kt

@@ -113,8 +113,7 @@ class ExplorationActivityPresenter @Inject constructor(
     }
 
     binding.explorationToolbar.setNavigationOnClickListener {
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      activity.onBackPressed()
+      activity.onBackPressedDispatcher.onBackPressed()
     }
 
     binding.actionAudioPlayer.setOnClickListener {

app/src/main/java/org/oppia/android/app/resumelesson/ResumeLessonActivity.kt

@@ -3,6 +3,7 @@ package org.oppia.android.app.resumelesson
 import android.content.Context
 import android.content.Intent
 import android.os.Bundle
+import androidx.activity.OnBackPressedCallback
 import org.oppia.android.app.activity.ActivityComponentImpl
 import org.oppia.android.app.activity.InjectableAutoLocalizedAppCompatActivity
 import org.oppia.android.app.home.RouteToExplorationListener
@@ -41,6 +42,15 @@ class ResumeLessonActivity :
       params.parentScreen,
       params.checkpoint
     )
+    onBackPressedDispatcher.addCallback(
+      this,
+      object : OnBackPressedCallback(/* enabled = */ true) {
+        override fun handleOnBackPressed() {
+          resumeLessonActivityPresenter.setReadingTextSizeNormal()
+          finish()
+        }
+      }
+    )
   }
 
   // TODO(#1655): Re-restrict access to fields in tests post-Gradle.
@@ -113,9 +123,4 @@ class ResumeLessonActivity :
   override fun onDefaultFontSizeLoaded(readingTextSize: ReadingTextSize) {
     resumeLessonActivityPresenter.loadResumeLessonFragment(readingTextSize)
   }
-
-  override fun onBackPressed() {
-    resumeLessonActivityPresenter.setReadingTextSizeNormal()
-    finish()
-  }
 }

app/src/main/java/org/oppia/android/app/resumelesson/ResumeLessonActivityPresenter.kt

@@ -73,8 +73,7 @@ class ResumeLessonActivityPresenter @Inject constructor(
         context = activity,
         ReadingTextSize.MEDIUM_TEXT_SIZE
       )
-      @Suppress("DEPRECATION") // TODO(#5404): Migrate to a back pressed dispatcher.
-      activity.onBackPressed()
+      activity.onBackPressedDispatcher.onBackPressed()
     }
   }